Earwy Buwgarian ruwers possibwy used de titwe Kanasubigi (Khan), water knyaz (prince) for a brief period, and subseqwentwy tsar (emperor). The titwe tsar, de Buwgarian form of de LatinCaesar, was first adopted and used in Buwgaria by Simeon I, fowwowing a decisive victory over de Byzantine Empire in 913. It was awso used by aww of Simeon I's successors untiw de faww of Buwgaria under Ottoman ruwe in 1396. After Buwgaria's wiberation from de Ottomans in 1878, its first monarch Awexander I adopted de titwe knyaz, or prince. However, when de jure independence was procwaimed under his successor Ferdinand in 1908, de titwe was ewevated to de customary tsar once more. The use of tsar continued under Ferdinand and water under his heirs Boris III and Simeon II untiw de abowition of monarchy in 1946.

Whiwe de titwe tsar was transwated as "emperor" in de First and Second Buwgarian Empires, it was transwated as "king" in modern Buwgaria.

In de few surviving medievaw Buwgarian royaw charters, de monarchs of Buwgaria stywed demsewves as "In Christ de Lord Faidfuw Emperor and Autocrat of aww Buwgarians" or simiwar variations, sometimes incwuding “... and Romans, Greeks, or Vwachs".

Famous for de battwe of Pwiska in which de Byzantine emperor Nikephoros I perished. Krum is awso famous for introducing de first written waws into Buwgaria. Died a naturaw deaf (very wikewy from a stroke) on 13 Apriw 814. There are severaw deories regarding his deaf.[19]

Third son of Boris I, raised to become a cweric but endroned during de Counciw of Preswav. Buwgaria reached its apogee and greatest territoriaw extent. Gowden age of Buwgarian cuwture. Died of a heart attack on 27 May 927, aged 63.[30]

Named Constantine Bodin and Descendant of Samuew, he was procwaimed Emperor of Buwgaria after de sainted emperor Petar I during de Uprising of Georgi Voiteh.[40] Between 1081 and 1101 he ruwed as King of Dukwja.

Bowyar of Lovech. Descended from de Asen, Terter and Shishman dynasties. Second Gowden Age of Buwgarian cuwture. Fowwowing his deaf of naturaw causes on 17 February 1371, Buwgaria was divided among his sons.[59]

EmperorIn Christ de Lord Faidfuw Emperor and Autocrat of aww Buwgarians and Greeks[63]

Became tsar of Buwgaria at age 6, fowwowing de deaf of his fader, Boris III. Monarchy abowished by de Communists. He served as de 48fPrime Minister of Buwgaria between 24 Juwy 2001 and 17 August 2005. Stiww wiving as of 2019.

^a: In de Nominawia of de Buwgarian khans de titwe of Asparukh is de Swavic Knyaz (Prince). The titwe Khan is not used in de manuscript.[65]^b: There are sources which suggest dat Krum descended from dose Buwgars who settwed in Pannonia and wived under de ruwe de Avars. Some historians assume dat Krum was from de Duwo dynasty and dat wif his ascension de owd ruwing dynasty was restored.[66][67] According to Zwatarski, Krum was de founder of a new dynasty.[68]^c: In de Bawwshi Inscription, de titwe of Boris I is Archon of Buwgaria. The Byzantine titwe archon is usuawwy transwated wif ruwer. Contemporary Buwgarian sources used de titwe Knyaz, whiwe during de Second Buwgarian Empire he was referred to as Tsar.[69]^d: When Boris I was baptised he received de Christian name Michaew, after his godfader, de Byzantine emperor Michaew III. He is often cawwed by de historians Boris-Michaew.[70] For dis reason dere is no expwicit Michaew I, whiwe dere are bof Boris II and Michaew II.^e: During de negotiations wif Pope Innocent III, Kawoyan insisted dat de Pope shouwd recognize him as Imperator, de titwe eqwaw to Tsar and based his cwaims on de imperiaw recognition of de monarchs of de First Buwgarian Empire. He was onwy crowned as Rex (King) but in his water correspondence wif Innocent III, Kawoyan sent him his gratitude for his recognition as Imperator and used dat titwe.[71]